package com.dyb.springcloud.controller;

import cn.hutool.core.collection.CollectionUtil;
import com.dyb.springcloud.entities.CommonResult;
import com.dyb.springcloud.entities.Payment;
import com.dyb.springcloud.lb.LoadBalancer;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
public class OrderController {

    private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (CollectionUtil.isEmpty(instances)) {
            return null;
        } else {
            ServiceInstance serviceInstance = loadBalancer.serviceInstance(instances);
            URI uri = serviceInstance.getUri();
            return restTemplate.postForObject(uri+"/payment/create",payment,CommonResult.class);
        }
        //return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        //手写轮询方式
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (CollectionUtil.isEmpty(instances)) {
            return null;
        } else {
            ServiceInstance serviceInstance = loadBalancer.serviceInstance(instances);
            URI uri = serviceInstance.getUri();
            return restTemplate.getForObject(uri+"/payment/get/"+id,CommonResult.class);
        }
        //return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        //手写轮询方式
        ResponseEntity<CommonResult> entity= restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else {
            return new CommonResult<>(444,"操作失败");
        }

    }

    @GetMapping("/consumer/payment/lb")
    public String getMyLb(){
        //手写轮询方式
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (CollectionUtil.isEmpty(instances)) {
            return null;
        } else{
            ServiceInstance serviceInstance = loadBalancer.serviceInstance(instances);
            URI uri = serviceInstance.getUri();
            return restTemplate.getForObject(uri+"/payment/lb",String.class);

        }
    }
}
